Modular grid surfacing unit



FIG. 1 is a top plan view of a modular grid surfacing unit showing our new design;

FIG. 2 is an elevational view taken along line 2--2 in FIG. 1;

FIG. 3 is an elevational view taken along line 3--3 in FIG. 1;

FIG. 4 is an enlarged fragmentary top perspective view; and

FIG. 5 is a bottom plan view. 

The ornamental design for a modular grid surfacing unit, as shown and described. 